Thom Yorke and Jonny Greenwood appear in uncaptioned image
Greenwood says it's 'fun to see everyone again'
Paul Thomas Anderson film will be released in UK cinemas in January 2015
Students also "generated potential strategies on how to release the next Radiohead album"
Selway performed 'It Will End in Tears' from solo album 'Weatherhouse'
Earlier speculation suggested Radiohead themselves had recorded 'Spooks' for Paul Thomas Anderson film 'Inherent Vice'
Instrumental was debuted live in 2006
Album is available via BitTorrent to bypass "the self elected gate-keepers", says Yorke
The frontman posts a series of drawings and artwork on Twitter
The track appears on the band's sixth album 'Hail To The Thief'